Merge "Fix crash running old HC apps."

    DrvScript *drv = (DrvScript *)s->mHal.drv;

    // We only support slot 0 (root) at this point in time.

    rsAssert(slot == 0);

    mtls.sig = 0x1f;  // temp fix for old apps, full table in slang_rs_export_foreach.cpp

    if (drv->mExportForEachSignatureList) {

        mtls.sig = drv->mExportForEachSignatureList[slot];

    }

    if (ain) {

        mtls.dimX = ain->getType()->getDimX();

        mtls.dimY = ain->getType()->getDimY();